Tool for use in grinding or shaping ignition points



Dec. 1 2 1,519,8Z&

C. L. FUSAY TOOL FOR uss IN GRINDING o3 SHAPING IGNITION PQINTS FiledMarch 15, 1924 IN VENTOR C; RM

1.) ATTORNEY Patented Dec. 16, 1924:.

tlltlTED STATES CHARLES L. FUSAY, OF NEW YORK, N. Y.

TOOL FOR USE IN GRINDING OR SHAPING IGNITION POINTS.

Application filed March 15, 1924. Serial No. 699,543.

T 0 all whom it may concern:

Be it known that I, GrrAnLns L. FUsAY, a citizen of the United States,and a resident of the city, county, and State of New York, have inventedcertain new and useful Improvements in Tools for Use in Grinding orShaping Ignition Points, of which the following is a specification.

This invention relates to an improved tool for use in grinding orshaping ignition points and has for its primary object to provide a verysimple device by means of which the circuit closing points or contactsof ignition systems, such as are used. in the operation of automobiles,may be accurately ground or re-surfaced so as to secure perfeet contactbetween the points and thereby obtain a spark of maximum intensity inthe engine cylinders.

It is another object of my invention to provide a tool of this characterwhich may be advantageously used in the grinding or facing of the pointsor contacts on the movable arms and also the stationary contacts of theignition system. In one embodiment of the invention I provide a base oranvil having a longitudinally extending channel and wear plates vfixedupon the anvil at each side of said channel. A. post is verticallymovable in the anvil and urged upwardly by means of a suitable spring.The upper end of this post projecting into the channel has a threadedbore to receive the stem of the stationary points or contact members ofthe ignition system. There is also mounted in the anvil a verticallyadjustable screw and means is provided for pivotally mounting upon saidscrew the movable contact or point carrying arm of the ignition systemso that the end of said arm having the contact thereon may be positionedupon the upper end of said post. The grinding stone is adapted to bemoved transversely across the wear plates and in placing this stone inposition, the post i forced downwardly against the action of the springwhereby the ignition point or contact member is yieldingly urgedupwardlyv against the stone. By proper manipulation of the stone, thesurface of the ignition point or contact may be rapidly evened or worndown until such surface throughout its area is disposed in a planeparallel with the surfaces of said wear plates.

It is a further object of the invention to provide a tool having. theabove noted fea tures which consists of relatively few parts of simpleconstruction and may therefore be manufactured. and sold atcomparatively small cost.

lVith the above and other objects in view, the invention consists in theimproved tool and in the forni, construction and relative arrangement ofits several parts as will be hereinafter more fully described,illustrated in the accompanying drawings, and subsequently incorporatedin the subjoined claims.

In the drawing wherein I have illustrated one simple and satisfactoryembodiment of the invention and in which similar reference charactersdesignate corresponding parts throughout the several views:

Figure 1 is a vertical sectional view showing my improved tool andhaving one of the movable contact point carrying arms arranged inposition thereon;

Figure 2 is a top plan View, the point carrying arm being omitted andone of the stationary contact members disposed in position to be faced;

Figure 3 is a vertical section taken on the line 83 of Figure 2; and

Figure 4 is an end elevation.

Referring in detail to the drawings, 5 designates an anvil or base whichmay be of any suitable size and shape and is preferably formed fromaluminum or other relatively lightmetal. The upper portion of this anvilis provided with a longitudinally extending channel 6 and to the uppersurface of the anvil at opposite sides of this channel and extending theentire length thereof, the wear plates 7, preferably of hardened steel,are secured.

The anvil or base 5 at one side of its central portion is bifurcated 0rrecessed and in the upper and lower parallel portions, a verticallydisposed post 8 is loosely mounted in suitable openings for axialmovement. This post is normally urged upwardly by means of a coil spring9, the lower end of which engages the base or anvil 5 and the upper endof which is engaged against a pin 10 which is adjustable in the seriesof spaced transverse openings 11 formed through said post. This pincontacting with the upper portion of the base or anvil 5 acts as a stopto limit the upward movementof said post. The upper end of the post 8 isfurther provided with an axially extending threaded bore 12 and in thisbore the threaded stem or shank of a stationary contact point, such asthat indicated at C is adapted to be removably engaged.

At one end of the channel 6 the upper portion of the anvil body isprovided with a horizontal extension 13 in which .a vertically disposedscrew 14L is threaded. The upper end of this screw is bifurcated orprovided with the spaced lugs or ears 15 which are apertured to looselyreceive a pin 16.

In Figure 1 I haveillustrated one of the pivotally movable arms A of anignition system which carries at one end the movable contact point G Theother end of this arm is adapted to be disposed between the ears 15, theopenings therein receiving the pins 16. Then in this position it will benoted that the other end of the arm carrying the contact point C restsupon the upper end of the post 8. By turning the screw ll to raise orlower the same, the arm A may be disposed in any desired inclination sothat the face of the point C will be positioned in the proper planerelative to the surfaces of the wear plate 7. v

In the operation of the device as just described, the grinding orabrading stone S shown in Figure 1, is engaged upon the contact point Cand pressed downwardly against the action of the spring 9 until thestone contacts with the wear plate 7. The spring 9 is thus compressedand constantly urges the post 8 and the free end of the arm A upwardly,therefore yieldingly holding the surface of the contact point C againstthe underside of the stone S. By now rapidly reciprocating this stoneacross and in contact with the wear plates 7, the abrasive actionthereof upon the contact point 0 wears 'down the face of said pointuntil said face throughout the area thereof is in a plane parallel withthe upper surfaces of the wear plates 7. In this manner, the contactpoints on the several movable parts A of the ignition system may be veryeasily and quickly mounted and the faces of said contact points properlyand accurately faced. In facing the stationary contact points C, whichare provided with the threaded stems or shanks, the screw 14 is notused, it being only necessary to thread the shank of the contact pointinto the bore 12 in the upper end of the post. The face of the contactpoint would then be properly ground by means of the stone S in themanner above referred to. By adjusting the pin 10 in the transverseopenings 11 0f the post 8 the spring 9 may be caused to exert anydesired degree of upward pressure of the contact point against thesurface of the stone.

From the foregoing description considered in connection with theaccompanying drawing, the construction, manner of use and severaladvantages of -my improved tool will co-operating parts which I havefound to be entirely satisfactory in practical use, However, it will beapparent that these parts might be otherwise formed and arranged and theessential features of my invention exemplified in other mechanicalstructures, than that herein described in detail. Accordingly, it is tobe understood that I reserve the privilege of resorting to all suchlegitimate changes in the form, construction and relative arrangement ofthe several parts as may be fairly embodied within the spirit and scopeof the invention as claimed.

I claim:

1. A tool of the character described, comprising a base having a channelin its upper surface and wear plates at each side of said channel, aperpendicular post mounted in the base and adapted to support a contactpoint on its upper end, and a spring urging said post upwardly above thechannel and acting to yieldingly press the contact point against theface of an abrasive member movable upon and across said wear plates.

2. A tool of the character described, comprising a base having a channelin itsupper surface and wear plates at each side of said channel, aperpendicular post mounted in the base and adapted to support a contactpoint on its upper end, a spring urging said post upwardly above thechan nel and acting to yieldingly press the contact point against theface of an abrasive member movable upon and across said wear plates, andmeans for varying the tension of said spring and the distance to whichsaid post is projected by the spring above said wear plates.

3. A tool of the character described comprising a base having a channelin its upper surface and wear plates at each side of said channel, aperpendicular post mounted in the base and adapted to support a contactpoint on its upper end, a spring.

urging said post upwardly above the'channel and acting to yieldinglypress the contact point against the face of an abrasive member movableupon and across said wear plates, a vertically adjustable screw mountedin the base in spaced relation to said post, and means for pivotallymounting one end of a contact point carrying arm upon said screw wherebythe contact point on the other end of the arm may be positioned upon theupper end of said post.

till

4. A tool of the character described comprising a base having a channelin its upper surface and Wear plates secured u on the base at each sideof said channe, a perpendicular post Vertically movable in the base andhaving a longitudinally threaded bore in its upper end to receive thethreaded shank of an ignition contact point, a spring urging said postupwardly to normally position the contact point above said Wear platesand a pin transversely adjustable in the post to regulate the action ofsaid spring and vary the pressure of the contact point against the underface of the stone disposed upon and movable over said Wear plates, saidp-in engaging the base to limit the upward movement of said post.

In testimony that 1 claim the foregoing as my invention, I have signedmy name hereto.

CHARLES L? F USAY.

